WO2019112074A1

WO2019112074A1 - Device and method for generating on-axis digital hologram and off-axis digital hologram

Info

Publication number: WO2019112074A1
Application number: PCT/KR2017/014075
Authority: WO
Inventors: 김병목; 성맑음; 박성진; 이상진
Original assignee: 주식회사 내일해
Priority date: 2017-12-04
Filing date: 2017-12-04
Publication date: 2019-06-13
Also published as: US20220043393A1; US20190171162A1; US11175626B2

Abstract

Disclosed is a device and method for generating an on-axis digital hologram and an off-axis digital hologram. A device for generating an on-axis digital hologram and an off-axis digital hologram according to the present invention comprises: a phase object generation unit for accessing a phase file of an object, which is stored in a storage device, so as to generate object phase information from the phase file of the object; a digital object light generation unit for generating digital object light information on the basis of a light characteristic of object light, which is input by a user, and the object phase information generated by the object phase generation unit; a digital reference light generation unit for generating digital reference light information on the basis of a light characteristic of reference light, which is input by the user; and a digital hologram generation unit for generating a digital hologram on the basis of hologram characteristic information input by the user, the digital object light information generated by the digital object light generation unit, and the digital reference light information generated by the digital reference light generation unit.

Description

Patent application title: DEVICE AND METHOD

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for and a method for generating a defocused digital hologram.

More specifically, the present invention simulates an interference pattern of a digital hologram based on wave optics by digitally synthesizing virtual object light and imaginary reference light having phase information of an object requiring generation of a hologram In addition, by creating a digital hologram, it is possible to reconstruct a hologram without using a complicated and expensive optical apparatus as compared with a conventional digital hologram reconstruction apparatus using a computer generated hologram (CGH) technique, It is possible to generate the hologram, shorten the hologram generating time, solve the problem of the use of the high capacity memory of the computer, and perform the research using the hologram and / or the simulation using the simulation for generating the hologram Judging whether the experiment failed or an example of the final result It is possible to perform pre-feasibility test as much as possible, so that it is possible to remarkably reduce waste of time and manpower according to unnecessary repetitive research and / or execution of experiments, And more particularly, to an apparatus and method for generating a defocused digital hologram.

A digital holography microscope is a microscope that measures the shape of an object using digital holography technology.

If a general microscope is a device that measures the shape of an object by measuring the intensity of light reflected or transmitted from an object by irradiating an ordinary light source to the object, the digital holography microscope can detect the interference and diffraction phenomenon of light, And digitally records the information, and restores the shape information of the object from the information.

That is, the digital holography technique generates light of a single wavelength such as a laser, divides the light into two lights using a light splitter, directs one light directly to the image sensor (referred to as a reference light) When the light reflected from the object to be measured is projected on the image sensor (referred to as object light) in the light of the object, the reference light and the object light interfere with each other in the image sensor. And the shape of the object to be measured is restored using the computer with the recorded interference fringe information. At this time, the recorded interference fringe information is generally referred to as a hologram.

On the other hand, in the case of a conventional optical holography technique other than digital holography, the interference fringe information of the light is recorded as a special film, and in order to restore the shape of the measurement object, the reference light is reflected on a special film on which interference fringes are recorded The shape of the virtual object to be measured is restored in the place where the object is originally located.

The digital holography microscope measures the interference fringe information of the light by a digital image sensor and stores the information in a digital manner when compared with the conventional optical holography method. The digital interference fringe information is stored in a numerical calculation method using a computer device So that the shape of the object to be measured is restored.

In a conventional digital holography microscope, a laser light source of a single wavelength may be used first. However, in the case of using a single laser light source, there is a problem that the measurement resolution of the object, that is, the minimum measurement unit is limited to the wavelength of the laser light source used. In the case of using a laser light source of two wavelengths or multiple wavelengths in a conventional digital holography microscope, the cost is increased by using light sources having different wavelengths, or sequentially obtaining hologram images using light sources of different wavelengths There is a problem that it is difficult to measure three-dimensional change information of an object to be measured in real time.

In addition, in the above-described conventional digital holography technique, a CGH (Computer Generated Hologram) is generated by a computer to restore the shape of an object to be measured, and then displayed on a spatial light modulator (SLM) , A three-dimensional hologram image of the object is obtained by diffraction of reference light.

More specifically, FIG. 1A schematically illustrates recording and hologram creation of a holographic recording in accordance with the conventional digital holography technique, and FIG. 1B is a diagrammatic representation of processing steps in a conventional digital holography technique.

First, referring to FIG. 1A, a conventional digital holography technique includes data acquisition-restoration-generation-display technology based on interference of light. That is, in the conventional digital holography technique, the fringe pattern (interference pattern) between the object light reflected from the three-dimensional object and the reference light is recorded (left drawing in FIG. 1A), and the obtained fringe pattern (interference pattern) Dimensional reconstructed image. In Fig. 1A, a fringe pattern (interference fringe) is the pattern recording shown in the left lower portion of Fig. 1A, and the image reconstructed in three dimensions is an image having the three-dimensional effect shown in the lower right portion of Fig.

Referring to FIG. 1B, in the above-described conventional digital holography technique, three-dimensional image information about a target object is acquired using an existing optical holography technique. Thereafter, the obtained three-dimensional image information is stored in a digital image sensor including a CCD or a CMOS. Thereafter, the stored three-dimensional image information is subjected to a digital processing step. This digital processing step comprises the following steps: 1) obtaining three-dimensional model data; 2) processing to generate CGH from the obtained three-dimensional model data; And 3) obtaining hologram data from the generated CGH. Here, the finally acquired hologram data is a hologram in which a holographic fringe pattern (interference fringe) obtained by a photoelectric device including CCD or CMOS or generated by a mathematical model is superimposed, and includes information on three-dimensional object data. Thereafter, the finally acquired hologram data is reconstructed into a three-dimensional image by using a spatial light modulator (SLM).

The CGH used in the above-described conventional digital holography technique uses a point source-based fringe pattern algorithm to generate a fringe pattern (interference fringe). In order to use this point source-based fringe pattern algorithm, a computer requires a considerable amount of memory usage, and a hologram is generated at a slow speed. According to the conventional method of CGH, the calculation speed per one point is 60.67 milliseconds (ms). Based on this, it takes 63617.10 seconds to generate the 1024 * 1024 resolution hologram and the memory usage is 6GB (1024 * 1024 * 8bit + 1024 * 1024 * 8bit * 768 6GB). In order to improve the memory usage and speed, a recent CGH publication (Accelerated one-step generation of full-color holographic videos using a color-tunable novel-look-up-table method for holographic three- According to Cheol, Kim et al. Scientific Reports, September, 2015, the calculation speed per one point is 2.55 milliseconds (ms). Based on this, it takes 2673.86 seconds to generate a hologram having the same resolution as the above- Is 12 KB (1024 * 1024 * 8 bits + 1024 * 1 * 8 bits * 1024 = 12 KB).

In addition, in the conventional digital holography technique, the reconstruction of the hologram is optically performed using the SLM, and in order to use the SLM, the use of additional optical devices such as a laser, an optical system, and the like is required. Therefore, in the conventional digital holography technique, it is required to use an expensive SLM, and the entire device still has a complicated structure.

In order to restore holograms of different objects in the conventional digital holography technique, a fringe pattern (interference fringe) between the object light and the reference light is recorded for each of different objects as described above And reconstructing the image of the object in three dimensions by diffracting and refracting the obtained fringe pattern (interference fringe). Accordingly, a considerable amount of time and manpower is required due to repetition of the same operation for generating holograms of different objects.

Further, in the conventional digital holography technique, for example, performing a pre-feasibility test such as a hologram and / or determining whether a research and / or experiment is failed or a final result at the time of conducting an experiment impossible.

Therefore, a new method for solving the above-mentioned problems is required.

(Prior art document)

(Patent Literature)

(Patent Document 1) 1. Korean Patent No. 10-2108001

(Patent Document 2) 2. Korean Patent No. 10-1308011

(Patent Document 3) 3. Korean Patent No. 10-1379327

(Patent Document 4) 4. Korean Patent No. 10-1412053

(Patent Document 5) 5. Korean Patent No. 10-1421984

(Patent Document 6) 6. Korean Patent No. 10-1489356

(Patent Document 7) 7. Korean Patent No. 10-1499804

(Patent Document 8) 8. Korean Patent No. 10-154178

(Patent Document 9) 9. Korean Patent No. 10-1573362

(Non-patent document)

(Non-Patent Document 1) Accelerated one-step generation of full-color holographic videos using a color-tunable novel-look-up-table method for holographic three-dimensional television broadcasting, Seung-Cheol, Kim et al. Scientific Reports, September 2015

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the conventional art, and it is an object of the present invention to digitally synthesize virtual object light and virtual reference light having phase information of an object requiring generation of a hologram, It is possible to reconstruct the hologram without using a complicated and expensive optical apparatus as compared with the conventional digital hologram reconstruction apparatus using the computer generated hologram (CGH) technique by simulating the interference pattern of the hologram and generating the digital hologram, It is possible to generate the same hologram as the actual hologram obtained with the hologram, shorten the hologram generating time, solve the problem of the use of the high capacity memory of the computer, and perform the simulation using the hologram and / Of the study and / or experiment using It is possible to perform a pre-feasibility test such as determination of the presence or absence of a defect or prediction of a final result, so that unnecessary repetitive research and / or waste of time and labor due to the execution of experiments can be remarkably reduced, And to provide a device and a method for generating a deflated and deflated digital hologram that can be expected to be highly applicable to education and education of students.

The apparatus for generating a correcting and de-compressing digital hologram according to a first aspect of the present invention includes an object phase generating unit connected to a phase file of an object stored in a storage device and generating object phase information from a phase file of the object; A digital object light generator for generating digital object light information based on the light characteristics of the object light input by the user and the object phase information generated by the object phase generation unit; A digital reference light generator for generating digital reference light information based on a light characteristic of the reference light input by the user; And a digital hologram generating unit that generates a digital hologram based on the hologram characteristic information input by the user, the digital object light information generated from the digital object light generating unit, and the digital reference light information generated from the digital reference light generating unit And the like.

According to a second aspect of the present invention, there is provided a method for generating a correcting and de-compressing digital hologram, comprising the steps of: a) generating object phase information from a phase file of an object by accessing a phase file of an object stored in the storage; b) generate digital object light and information based on the physical information of the object light inputted by the user and the object phase information data converted into the object phase information data (data) capable of generating the digital object light from the object phase information ; c) generating digital reference light and information based on the physical information of the reference light inputted by the user; And d) generating a digital hologram based on the hologram characteristic information input by the user, the generated digital object light information, and the generated digital reference light information.

The following advantages are achieved by using the apparatus and method for generating a defocused digital hologram according to the present invention as compared with a conventional digital hologram reconstruction apparatus using a conventional computer generated hologram (CGH) technique.

1. It is possible to reconstruct the hologram without using complicated and expensive optics.

2. It is possible to generate the same hologram as the actual hologram obtained optically.

3. Hologram creation time is shortened, and the problem of high capacity memory use of computer can be solved.

4. Performing a pre-feasibility test such as judging whether a research and / or experiment is failed or a final result by using a hologram simulation and / or a simulation for generating a hologram in advance of the experiment using the hologram It is possible to remarkably reduce unnecessary repetitive research and / or waste of time and labor due to the execution of experiments.

5. It is expected that highly educated hologram manpower training and students' education can be highly utilized.

Further advantages of the present invention can be clearly understood from the following description with reference to the accompanying drawings, in which like or similar reference numerals denote like elements.

FIG. 1A schematically illustrates holographic recording and hologram generation according to the conventional digital holography technique.

FIG. 1B is a diagram illustrating processing steps in the conventional digital holography technique.

FIG. 2A is a block diagram of an apparatus for generating a correcting and separating digital hologram according to an embodiment of the present invention.

FIG. 2B is a detailed block diagram of an object phase generating unit of the apparatus for generating a defocused and de-excluded digital hologram according to an embodiment of the present invention shown in FIG. 2A.

FIG. 2C is a detailed block diagram of a digital object light generating unit of the apparatus for generating a defocus / shrink digital hologram according to an embodiment of the present invention shown in FIG. 2A.

FIG. 2D is a detailed block diagram of a digital reference light generator of the apparatus for generating a defocused and de-emphasized digital hologram according to an embodiment of the present invention shown in FIG. 2A.

FIG. 2E is a detailed block diagram of a digital hologram generating unit of the apparatus for generating a defocused and de-emphasized digital hologram according to an embodiment of the present invention shown in FIG. 2A.

FIG. 2F illustrates a conventional optically-acquired hologram for a USAF (specifically, a 1951 USAF resolution test chart) target and a resolution for a hologram obtained using the apparatus for generating a deflated and deflated digital hologram according to an embodiment of the present invention In FIG.

FIG. 2G shows a three-dimensional interference mode (orthogonal interference mode) by using the apparatus for generating a deflated and deflated digital hologram according to an embodiment of the present invention for the same target (specifically, stairs having three different levels of thickness) , A de-axial interference mode, and a space-movement de-coupling scheme).

Figure 2h shows a hologram obtained using an existing optically acquired hologram for the same target and an apparatus for generating a deflated and deflated digital hologram according to an embodiment of the present invention.

FIG. 3 is a flowchart of a method of generating a correcting and separating digital hologram according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to embodiments and drawings of the present invention.

FIG. 2A is a block diagram of an apparatus for generating a defocus digital hologram according to an exemplary embodiment of the present invention.

Referring to FIG. 2A, the apparatus 100 for generating a correcting and de-compressing digital hologram according to an embodiment of the present invention connects object phase files stored in a storage device (not shown) to obtain object phase information from a phase file of the object An object phase generating unit 110; A digital object light generating unit 120 for generating digital object light information based on the light characteristics of the object light input by the user and the object phase information generated by the object phase generating unit 110; A digital reference light generator 130 for generating digital reference light information based on a light characteristic of the reference light input by the user; A digital hologram is generated based on the hologram characteristic information input by the user, the digital object light information generated from the digital object light generator 120, and the digital reference light information generated from the digital reference light generator 130 A digital hologram generating unit 140 for generating digital holograms; And the object phase generating unit 110, the digital object light generating unit 120, and the digital reference light generating unit 130.

In the apparatus 100 for generating a deflated and deflated digital hologram according to an embodiment of the present invention, each component (that is, a deflector) of the deflated and deflated digital hologram generating apparatus 100 according to an exemplary embodiment of the present invention A controller 150 for controlling the overall operations of the object phase generating unit 110, the digital object light generating unit 120, the digital reference light generating unit 130, and the digital hologram generating unit 140, The digital object light generating unit 120, the digital object light generating unit 110, the digital object light generating unit 120, and the digital reference light generating unit 110 constituting the apparatus 100 for generating a correcting and de-compressing digital hologram according to an embodiment of the present invention 130, a digital hologram generating unit 140, and a control unit 150).

Hereinafter, an object phase generation unit 110, a digital object light generation unit 120, a digital reference light generation unit (not shown) constituting the apparatus 100 for generating a defocused and de-emphasized digital hologram according to an embodiment of the present invention shown in FIG. 130, and the digital hologram generating unit 140 will be described in detail.

FIG. 2B is a detailed block diagram of an object phase generating unit of the apparatus for generating a defocused and de-excluded digital hologram according to an embodiment of the present invention shown in FIG. 2A, And FIG. 2D is a detailed block diagram of a digital reference light generator of the apparatus for generating a defocused digital hologram according to an embodiment of the present invention shown in FIG. 2A, and FIG. FIG. 2E is a detailed block diagram of a digital hologram generating unit of the apparatus for generating a defocused and de-emphasized digital hologram according to an embodiment of the present invention shown in FIG. 2A.

Referring to FIG. 2B, the object phase generating unit 110 of the apparatus 100 for generating a defocused and uncompressed digital hologram according to an exemplary embodiment of the present invention includes an object phase file position selector 111, A phase file conversion unit 112, and an object phase information generation unit 113. [ The object phase file position selection unit 111 selects a phase file of an object stored in a storage device (not shown) and loads the phase file of the object. In this case, the phase file of the object may be stored, for example, in a database in a storage device (not shown) in a user's personal computer (PC) or in a database in a storage device (not shown) on a separate external server. Here, the phase file of the selected object may be displayed on, for example, a display unit (not shown). For example, the display unit may be a monitor such as a personal computer (PC) or a desktop in which the apparatus 100 for generating a correcting and separating digital hologram according to an embodiment of the present invention is implemented, A display device such as a laptop, a palmtop, a personal digital assistant (PDA), or a cellular phone in which the digital hologram generating device 100 is implemented; Or an external monitor provided separately from the apparatus 100 for generating a deflated and deflated digital hologram according to an exemplary embodiment of the present invention, such as a TV screen, but the present invention is not limited thereto.

The phase file of the object selected by the object phase file position selector 111 is transferred to the object phase file converter 112. The object phase file conversion unit 112 converts the phase file of the object into phase information data (data) of a form usable in the object phase information generation unit 113 and transmits the phase information data to the object phase information generation unit 113 . The object phase information generation unit 113 generates object phase information in a form that can be used in the object phase information input unit 122 of the digital object light generation unit 120, which will be described later. Here, the phase information data includes magnification phase information of an object, magnification information of an objective lens used when magnification phase information of an object is recorded, and header information for storing and retrieving data in a storage device. The object phase information may include phase information of the object obtained from the phase information data, phase information of the object which does not use the objective lens based on the magnification information of the objective lens used when the magnification phase information of the object is recorded it means.

Referring to FIG. 2C, the digital object light generating unit 120 of the apparatus 100 for generating a correcting and de-condensing digital hologram according to an embodiment of the present invention includes an object light light characteristic input unit 121; An object phase information converting unit 122; And a digital information object light generating unit 123. The object optical light characteristic input unit 121 provides an object optical information input window on the display unit (not shown) through which the user can input physical information of the desired object light. Accordingly, the user can input the condition of the physical information of the object light including the wavelength information, the wave number information and the amplitude information of the light of the desired object light necessary for digitally generating light have. The object phase information converting unit 122 converts the object phase information obtained by connecting to the object phase information generating unit 113 of the object phase input unit 110 shown in FIG. 2B to an object capable of generating real digital object light Into phase information data (data). Here, the object phase information refers to the phase information inherent to the object not using the objective lens generated by the object phase information generation unit 113, and the object phase information data converted by the object phase information generation unit 122 is data Means that the optical light characteristic unit 121 is reworked based on the physical information input by the user. The physical information of the object light input through the object light light characteristic input unit 121 and the object phase information data converted by the object phase information input unit 122 are input to the digital object light and information generation unit 123, And the information generating unit 123 generate digital object light and information based on the physical information of the object light inputted and the converted object phase information data. The digital object light information generated by the digital object light and information generating unit 123 includes the object recorded position, the object phase, and the light property of the object . This can be expressed by the following equation (1).

Equation _{1: U DO (x, y} ) = U L (x, y) U O (x, y) U OP (x, y)

U _DO (x, y) in the formula 1 is a digital object light, U _L (x, y) is the object properties in a broad sense light information, U _O (x, y) is, U _OP phase information of the transformed object ( x, y) represents position information of an object.

2, the digital reference light generator 130 of the apparatus 100 for generating a correcting and de-condensing digital hologram according to an exemplary embodiment of the present invention includes a reference light light characteristic input unit 131, And an information generating unit 132. The reference light characteristic input unit 131 provides a reference light information input window on the display unit (not shown) through which the user can input the physical information of the desired reference light. Accordingly, the user can input the condition of the physical information of the reference light including the wavelength information of the light of the desired reference light, the Wavenumber information, the amplitude information, etc. necessary for digitally generating light have. The physical information of the reference light input through the reference light characteristic input unit 131 is transmitted to the digital reference light and information generation unit 132. The digital reference light and information generation unit 132 generates the digital reference light and the digital reference light based on the physical information of the input reference light. And information.

The digital object light information generated by the digital object light and information generating unit 123 shown in FIG. 2C and the digital reference light information generated by the digital reference light and information generating unit 132 shown in FIG. Is input to the digital hologram generating unit 140 shown in Figs. 2A and 2E and used to generate a digital hologram.

More specifically, referring to FIG. 2E, the digital hologram generating unit 140 of the apparatus 100 for generating a defocused and uncompressed digital hologram according to an embodiment of the present invention includes a hologram characteristic input unit 141 A digital object optical information input unit 142, a digital reference light information input unit 143, and a hologram generating unit 144.

First, the hologram characteristic input unit 141 shown in FIG. 2E provides a hologram characteristic information input window on the display unit (not shown) through which the user can input desired hologram characteristic information. Accordingly, the user can use an image sensor (e.g., a CMOS, a CCD, or the like) to generate and record a digital hologram such as a resolution, a bit-depth, a pixel size, (Not shown), and conditions of the digital hologram characteristic information including the interference mode parameter. In this case, the interference mode parameter controls the off-axis interference mode in which the object light and the reference light are incident on the same axis, and the off-axis interference mode in which the object light and the reference light are incident at a constant angle to each other Parameter. In addition, an interference mode parameter for controlling a spatial motion deinterleaving interference mode in which two lights interfere with each other due to a spatial difference, which is an interference mode belonging to a specific one of the deinterleaving interference modes, can be additionally used. More specifically, in the ortho-axial interference mode, when the hologram is reconstructed, the DC information, the real image and the virtual image information appear at one point, and a fringe pattern (interference fringe pattern) generally appears when the hologram is generated. On the other hand, in the de-axial interference mode, when the hologram is reconstructed, the DC information, the real image and the virtual image information are separately displayed. Generally, a line pattern appears when the hologram is generated. Therefore, upon inputting the condition of the digital hologram characteristic information, the user can select a desired one of the two interference modes (normal axial interference mode, de-axial interference mode) as described above. In addition, the user can additionally select a spatial movement de-interlace method instead of the two interference modes (normal axial interference mode, de-axial interference mode). That is, in the hologram characteristic input unit 141 of the digital hologram generating unit 140 of the apparatus 100 for generating a correcting and de-condensing digital hologram according to an embodiment of the present invention, two interference modes (normal mode , De-axial interference mode), or any one of three interference modes (normal axial interference mode, de-axial interference mode, and spatial movement de-compression mode).

The digital object optical information input unit 142 of the digital hologram generating unit 140 is connected to the digital object light generating unit 120 (specifically, the digital object light and information generating unit 123) Optical information is input. The digital reference light information input unit 143 of the digital hologram generating unit 140 receives the digital reference light information obtained by connecting to the digital reference light generating unit 130 (specifically, the digital reference light and information generating unit 132) do. Then, the hologram characteristic information input to the hologram characteristic input unit 141, the digital object light information input to the digital object light information input unit 142, and the digital reference light information input to the digital reference light information input unit 143, And the hologram generating unit 144 generates a digital hologram based on the transmitted hologram characteristic information, digital object light information, and digital object light information. This can be expressed by the following equation (2).

Equation _{2: U H (x, y} ) = U DO (x, y) U RS (x, y) + U DR (x, y) U RS (x, y) U I (x, y)

In the formula _{2, U H (x, y} ) is generated digital object hologram, U _DO (x, y) is the digital object light, U _DR (x, y) is the digital reference light, U _RS (x, y) is The characteristic parameter information, U _I (x, y), which is the physical information of the image sensor used when recording the hologram inputted by the user, is the interference mode parameter information inputted by the user.

As described above, by using the apparatus 100 for generating a defocused and de-excluded digital hologram according to an embodiment of the present invention, virtual object light having phase information of an object requiring generation of a hologram and virtual reference light can be digitally It is possible to generate digital holograms based on wave optics.

Hereinafter, the difference between the hologram obtained by using the apparatus 100 for generating a defocused and de-emphasized digital hologram according to an embodiment of the present invention and the conventional optically obtained hologram will be described.

2F shows a conventional optically-acquired hologram for a USAF (specifically, a 1951 USAF resolution test chart) target and a hologram obtained using an apparatus 100 for generating a defocused and uncompleted digital hologram according to an embodiment of the present invention FIG. 2G is a view showing the difference in resolution between the deflecting and deflecting digital hologram producing device (FIG. 2B) and the deflecting digital hologram producing device according to an embodiment of the present invention for the same target (specifically, stair having three different thicknesses) 100), the hologram obtained by the three interference modes (the normal interference mode, the de-axial interference mode, and the spatial movement de-compression mode).

First, the object (i.e., USAF target) phase information used to obtain the hologram obtained using the apparatus 100 for generating a defocused and de-excluded digital hologram according to an embodiment of the present invention for a USAF target, Wavelength, Wavenumber, and Amplitude of light of the object light used in the object light light characteristic input unit 121 of the unit 120, (E.g., Wavelength, Wavenumber, Amplitude, etc. of light of the reference light) used in the reference light characteristic input unit 131 of the unit 130, The hologram characteristic information that can be input by the user to the hologram characteristic input unit 141 of the image sensor 140 includes interference mode information, hologram recording distance information, a pixel size of the image sensor device to be recorded, Standing the bit depth of the device can include a (Bit depth), the resolution (Resolution) of the image sensor device which records the like, but should be noted that it is not limited to this point.

Further, the apparatus and / or information used to obtain the existing optically obtained hologram may include, but is not limited to, a laser (light source), an objective lens, a light splitter, an optical mirror, an image sensor, a collimator, It should be noted.

As shown in FIG. 2F, the resolution of the hologram obtained using the apparatus 100 for generating the defocused and deflated digital hologram according to the embodiment of the present invention is clearly improved compared to the resolution of the existing optically obtained hologram, .

2G, the hologram obtained by the three interference modes (the normal interference mode, the de-axial interference mode, and the spatial movement de-compression mode) by using the apparatus 100 for generating a defocused and de-axialized digital hologram according to an embodiment of the present invention, Are different from each other or have different characteristics. Herein, the normal axial interference mode is a case where the path of the object light and the reference light is spatially parallel and coinciding with each other. An interference fringe of a circular fringe pattern is generated. The interference fringe pattern is generated according to the degree of curvature of the object light and reference light. The interval is determined. In the de-axial interference mode, there is a tilt angle in which the path of the object light and the reference light is spatially inclined. A linear interference fringe is generated, and the interference fringe interval is determined according to the tilted angle. The spatial movement de-coupling mode is a case in which the object light and the reference light proceed parallel to each other but do not travel in the same path. A straight-line interference fringe is generated and the interval of the interference fringes is determined according to the path difference between the object light and the reference light.

As shown in FIG. 2h, it can be confirmed that the holograms obtained using the apparatus 100 for generating a defocused and de-excluded digital hologram according to an embodiment of the present invention are identical to those of the optically obtained hologram . Therefore, in the present invention, it is possible to generate the same hologram as the optically obtained actual hologram without using the complicated and expensive optical apparatus of the prior art.

3 is a flowchart of a digital hologram generating method according to an embodiment of the present invention.

Referring to FIG. 3 together with FIGS. 2A to 2F, a method 300 for generating a correcting and de-compressing digital hologram according to an embodiment of the present invention comprises the steps of: a) connecting to a phase file of an object stored in a storage device Generating (310) object phase information from a phase file of the object; b) generate digital object light and information based on the physical information of the object light inputted by the user and the object phase information data converted into the object phase information data (data) capable of generating the digital object light from the object phase information (320); c) generating (330) digital reference light and information based on the physical information of the reference light input by the user; And d) generating (340) a digital hologram based on the hologram characteristic information input by the user, the generated digital object light information, and the generated digital reference light information.

In the method 300 for generating a correcting and de-compressing digital hologram according to an embodiment of the present invention, the step a) Selecting a phase file of the object stored in the storage device (not shown) by the object phase file position selector 111 and transmitting the selected phase file to the object phase file converter 112; a2) The object phase file converting unit 112 converts the phase file of the object into phase information data (data) of a form usable in the object phase information generating unit 113, and the object phase information generating unit 113 ); And a3) generating the object phase information by the object phase information generating unit 113. [

In addition, in the method (300) for generating a correcting and de-compressing digital hologram according to an embodiment of the present invention, in the step b) The object light information input unit 121 inputs the object light information, and the object phase information obtained by the object phase information converting unit 122 is converted into object phase information data (data) capable of generating the digital object light Converting; b2) inputting the physical information of the input object light and the converted object phase information data to the digital object light and information generating unit 123; And b3) generating the digital object light and information based on the physical information of the input object light and the converted object phase information data in the digital object light and information generating unit 123. [

In the method 300 for generating a correcting and de-compressing digital hologram according to an embodiment of the present invention, the step c) includes the steps of: c1) inputting physical information of the reference light desired by the user to the reference light characteristic input part 131 ; And c2) generating digital reference light and information based on the physical information of the reference light by receiving the physical information of the reference light from the reference light characteristic input unit 131 in the digital reference light and information generating unit 132. [

Further, in jeongchuk and talchuk digital hologram generation method 300 in accordance with one embodiment of the present invention, the light wherein the digital object is U _DO (x, y) = U _L (x, y) U _O (x, y) U _OP is represented by (x, y), where U _DO (x, y) is the light, U _L the digital object (x, y) is a characteristic of the object beam light information, U _O (x, y) is converted U _OP (x, y) represents the position information of the object.

In the method 300 for generating a correcting and de-compressing digital hologram according to an embodiment of the present invention, the physical information of the object light includes wavelength information (Wavelength) of the light of the object light required for digitally generating light, (Wavenumber), and amplitude information (Amplitude), and the physical information of the reference light includes wavelength information of a light of the reference light required for digitally generating light, Wavenumber information, and Amplitude information The hologram characteristic information is a characteristic parameter and an interference mode parameter of the image sensor to which the digital hologram is to be generated and recorded. Herein, the characteristic parameters of the image sensor include a resolution, a bit-depth, and a pixel size, and the interference mode parameters include an ortho-axial interference mode, a de-axial interference mode, Interference mode.

In the method of generating a correcting and de-compressing digital hologram 300 according to an embodiment of the present invention, the step d) includes the steps of: inputting the hologram characteristic information desired by a user to the hologram characteristic input unit 141; d2) inputting the digital object optical information to the digital object optical information input unit 142; d3) inputting the digital reference light information to the digital reference light information input unit 143; d4) transmitting the hologram characteristic information, the digital object optical information, and the digital reference light information to the hologram generating unit 144; And d5) generating the digital hologram based on the hologram characteristic information, the digital object light information, and the digital reference light information in the hologram generating unit 144. [

Further, the digital hologram in jeongchuk and talchuk digital hologram generation method 300, the creation according to one embodiment of the present invention is U _H (x, y) = U _DO (x, y) U _RS (x, y _{) + U DR (x, y} ) U RS (x, y) U I (x, y), where U _H (x, y are represented by) are the generated digital object hologram, U _DO (x, y) is the digital object light, U _DR (x, y) is the digital reference light, U _RS (x, y) is to record a hologram the user enters physical information characteristic of the image sensor used in the parameter information, U _I (x, y) is the interference mode parameter information input by the user.

As described above, by using the apparatus 100 and method 300 for generating a defocused and de-excluded digital hologram according to the present invention, virtual object light having phase information of an object requiring generation of a hologram and virtual reference light It is possible to generate digital holograms based on wave optics by digitally synthesizing the digital holograms. In detail, the following effects can be achieved in the present invention.

1. It is possible to reconstruct the hologram without using a complicated and expensive optical device,

2. It is possible to generate the same hologram as the actual hologram obtained optically. Specifically, it can be confirmed that the same result is obtained when the three-dimensional information of the object is restored under the same conditions as the optically obtained hologram recording the same object and the hologram generated using the simulation (see FIG. 2H).

3. Hologram creation time is shortened. Specifically, it takes 63617.10 seconds to generate a 1024 * 1024 resolution hologram according to the conventional method of CGH described above. According to the method proposed by Seung-Cheol and Kim et al., A hologram of the same resolution is generated It takes 2673.86 seconds. On the other hand, when the apparatus 100 for generating a defocused and uncompressed digital hologram according to the present invention is used, a calculation speed per one point is 0.92 microseconds (s) Lt; RTI ID = 0.0 > hologram < / RTI >

5. Can solve the problem of using high capacity memory of computer. Specifically, according to the conventional method of CGH, the memory required for generating a hologram having a resolution of 1024 * 1024 is 6 GB, and according to the method proposed by Seung-Cheol, Kim et al. The memory required to generate the hologram is 12 KB. On the other hand, in the case of using the apparatus 100 for generating a correcting and de-compressing digital hologram according to the present invention, the memory required for generating the hologram having the same resolution as the above condition is 6 KB.

6. Performing a pre-feasibility test such as judging whether a study and / or experiment is failed or predicting a final result by using hologram simulation and / It is possible to remarkably reduce unnecessary repetitive research and / or waste of time and labor due to the execution of experiments.

7. It is expected that highly educated hologram specialist training and students' education can be highly utilized.

Various modifications may be made by those skilled in the art without departing from the spirit and scope of the invention as defined by the following claims. It is not. Accordingly, the scope of the present invention should not be limited by the above-described exemplary embodiments, but should be determined only in accordance with the following claims and their equivalents.

Claims

In the apparatus for generating a deflated and deflated digital hologram,

An object phase generation unit connected to a phase file of an object stored in the storage device and generating object phase information from the phase file of the object;

A digital object light generator for generating digital object light information based on the light characteristics of the object light input by the user and the object phase information generated by the object phase generation unit;

A digital reference light generator for generating digital reference light information based on a light characteristic of the reference light input by the user; And

A digital hologram generating unit for generating a digital hologram based on the hologram characteristic information input by the user, the digital object light information generated from the digital object light generating unit, and the digital reference light information generated from the digital reference light generating unit Wherein the digital hologram generating device comprises:
The method according to claim 1,

The object phase generation unit

An object phase file position selector for selecting a phase file of the object stored in the storage device;

An object phase file converting unit for receiving the phase file of the object selected from the object phase file position selecting unit and converting the received phase file into phase information data (data); And

And an object phase information generation unit that receives the phase information data converted from the object phase file conversion unit and generates object phase information.
The method according to claim 1,

The digital object light generating unit

An object phase information converting unit for converting the object phase information obtained from the base object phase generating unit into object phase information data (data) capable of generating the digital object light; And

And a digital object light for generating digital object light and information based on the physical information of the object light and the converted object phase information data, and an information generation unit.
The method according to claim 1,

The physical information of the object light includes Wavelength, Wavenumber, and Amplitude of light of the object light,

Wherein the digital object optical information includes an object recorded position of an object, an object phase of the object, and light property of the light.
The method according to claim 1,

The digital reference light generator

A reference light characteristic input unit for inputting physical information of a reference light desired by the user; And

And a digital reference light and an information generation unit receiving the physical information of the reference light from the reference light property input unit and generating digital reference light and information based on the physical information of the reference light and an information generation unit.
The method according to claim 1,

The digital hologram generating unit

A hologram characteristic input unit for inputting the hologram characteristic information desired by the user;

A digital object optical information input unit for inputting the digital object optical information;

A digital reference light information input unit for inputting the digital reference light information; And

And a hologram generating unit that receives the hologram characteristic information, the digital object light information, and the digital reference light information and generates the digital hologram based on the hologram characteristic information, the digital object light information, and the digital reference light information A device for generating a deflated and deflated digital hologram.
The method according to claim 1,

The hologram characteristic information may include information indicating whether the digital hologram is generated and recorded A parameter of the image sensor, and an interference mode parameter.
8. The method of claim 7,

The characteristic parameters of the image sensor include a resolution, a bit-depth, and a pixel size,

Wherein the interference mode parameter is any one of an ortho-axial interference mode, a de-axial interference mode, and a spatial-movement de-axial interference mode.
In the method for generating a correcting and de-compressing digital hologram,

a) connecting to a phase file of an object stored in a storage device to generate object phase information from the phase file of the object;

b) generate digital object light and information based on the physical information of the object light inputted by the user and the object phase information data converted into the object phase information data (data) capable of generating the digital object light from the object phase information ;

c) generating digital reference light and information based on the physical information of the reference light inputted by the user; And

d) generating a digital hologram based on the hologram characteristic information input by the user, the generated digital object light information, and the generated digital reference light information.
10. The method of claim 9,

The step a)

a1) Selecting a phase file of the object stored in the storage device by the object phase file position selection unit and transmitting the selected phase file to the object phase file conversion unit;

a2) converting the phase file of the object into phase information data (data) in a form usable in the object phase information generating unit and transmitting the converted phase information data to the object phase information generating unit; And

a3) generating the object phase information in the object phase information generating unit.
10. The method of claim 9,

The step b)

b1) Converting the object phase information obtained by the object phase information conversion unit into object phase information data (data) capable of generating the digital object light;

b2) inputting the physical information of the input object light and the converted object phase information data to the digital object light and information generating unit; And

b3) generating the digital object light and the information based on the physical information of the input object light and the converted object phase information data in the digital object light and information generating unit.
10. The method of claim 9,

The step c)

c1) inputting the physical information of the reference light desired by the user to the reference light characteristic input unit; And

c2) generating digital reference light and information based on the physical information of the reference light by receiving the physical information of the reference light from the reference light characteristic input unit in the digital reference light and information generating unit.
10. The method of claim 9,

The step d)

d1) inputting the hologram characteristic information desired by a user to the hologram characteristic input unit;

d2) inputting the digital object optical information to the digital object optical information input unit;

d3) inputting the digital reference light information to a digital reference light information input unit;

d4) transmitting the hologram characteristic information, the digital object optical information, and the digital reference light information to the hologram generating unit; And

d5) generating the digital hologram based on the hologram characteristic information, the digital object optical information, and the digital reference light information in the hologram generating unit (144).
10. The method of claim 9,

The digital object light is U DO (x, y) = U L (x, y) U O (x, y) U OP (x, y) is represented by where U DO (x, y) is the digital object, light, U L (x, y) is the object properties in a broad sense light information, U O (x, y) is converted the phase information of the object, U OP (x, y) represents the position information of the object,

The generated digital holograms U H (x, y) = U DO (x, y) U RS (x, y) + U DR (x, y) U RS (x, y) U I (x, y) is represented by where U H (x, y) is the generated digital object hologram, U DO (x, y) is the digital object light, U DR (x, y) is the digital reference light, U RS (x, y) is the characteristic parameter information of the image sensor used when the hologram inputted by the user is recorded, and U I (x, y) is the interference mode parameter information inputted by the user.
10. The method of claim 9,

The physical information of the object light includes Wavelength, Wavenumber, and Amplitude of light of the object light required to digitally generate light,

The physical information of the reference light includes wavelength information (Wavelength), wave number information (Wavenumber), and amplitude information (Amplitude) of light of the reference light required to generate light digitally,

The hologram characteristic information may include information indicating whether the digital hologram is generated and recorded A characteristic parameter of the image sensor, and an interference mode parameter.
16. The method of claim 15,

The characteristic parameters of the image sensor include a resolution, a bit-depth, and a pixel size,

The interference mode parameter may be any one of an ortho-axial interference mode, a de-axial interference mode, and a spatial-

A method of generating a right and left digital hologram.